Brake apparatus.



S. G. FREUND.

BRAKE APPARATUS.

APPLICATION FILED MAR. 27, 1908.

912,459. Patented Feb. 16, 1909.

ATTORNEYS sn'zerarsn c. FREUND, or NEW YORK, N. Y.

' BRAKE srrsnsm.

Specification of Letters Patent.

Application filed March 27, 1908. Serial No. 423,710.

Patented Feb. 16, 1909.

To all whom it may concern:

Be it known that .I, SIEGFRIED G. FREUND, a citizen of Germany, havin applied for the second United States DElIIII'fiiZtltlOII paper on March 18, 1908, and a resident of the city of New York, county of New York, and State of New York, have invented a certain new and useful Braking Apparatus, of which the following is a specification;

My invention relates to the automatic application and release of air brakes and is adapted for use in connection with vehicles of transportation, such as railroad cars, the motive power for which is steam or electricity.

By the use of my new method successive automatic applications and release of brakes is obtained, whereby brakes are automatically applied, released when the speed of the train has been reduced to a predetermined degree, automatically applied a second time at a desired moment, again released upon further predetermined decrease of speed, and finally applied as desired or subjected to additional applications and release.

I do not desire to limit myself to any particular form or arran ement of apparatus for carrying my method into execution, a desired arrangement bein shown in the drawing herewith and descrlbed hereafter, but I wish to cover broadly my new method of brake application and release and forms of mechanism designed to carry out such method, within the spirit of my invention as set forth and falling within the scope of the claims hereto appended. V

Figure 1 represents a desired form of mechanism embodying my invention, the arrangement of circuits therein being shown diagrammatically. Fig. 2 represents a detail view of a modified arrangement of certain parts of the mechanism.

Like characters of reference denote like parts in both the figures.

Turning to a detail descri tion of my invention in connection with t e embodiment thereof shown, it is as follows:

Reference letter A denotes a valve member provided with release passage 1 and passages 2 and 3 connected by passage 4 with the brake cylinder B and by passage 5 with the compressed air supply; at the point of juncture of passages 2. and 3 and of -5 is located the brake valve C with passage 6 which when raised the valve 8 W111 open passage 2 and close passage 1.

D represents the car motor, should the vehicle be an electric car, or a small generator as desired, adapted to operate in proportion to the speed of the'vehicle and connected to solenoids 10 and 11. D is also connected to a relay E. The circuit to solenoid 11 is broken when the armature 12 of relay E is raised and completed when the armature is released. The circuit to the motor D is opened or closed by means of a switch member F connected'to the valve lever 14 and adapted to complete the circuit when the valve 0 is brought into service position.

A relief valve 15 is inserted in the passage 5 and normally retained in a closed position by; spring member 16 on the valve stem 17; T e stem 17 passes through a solenoid 18, the valve being thereby adapted to be opened when the solenoid is energized todraw up its armature. Solenoid 18 is placed in the circuit of solenoid 1 1 between it and the relay E, the circuit to 18 being completed when the armature of relay E is released. The valve member 15 may be inserted in the brake cylinder B as desired (see Fig. 2), suitable connections being then provided to form the circuit for solenoid 18.

The 0 eration of applying brakes takes place as follows: The brake valve C is thrown into service position (as shown) thereby also closing switch F and completing the circuit between the motor D and the solenoids. Solenoid 10 is thereupon energized, its armature is raised and the valve member 8 moved upwards to 0 en passage 2 allowing passage of compresse air to the brake cylinder and closing release passage 1 solenoid E is also energized raising armature 12 and breaking the circuit to solenoids 11 and 18. .The solenoids 10, E and 11 are wound for different voltages, that of 10 being the highest;

high voltage will no longer be energized, the

voltage will still be high enough to energize solenoid-E; when the speed and consequent voltage have been still further reduced to a predetermined degree, solenoid E will no longer be energized, its armature will be released, thereby completin circuit to solenoids 11 and 18 and theseso enoids will be energized until a still further predetermined reduction of speed and voltage brings the latter below that for which 11 and 18 are wound and they are no longer ener zed. It will thus be.

seen that the brakes aving been applied when solenoid 10 is energized as described, the speed of the train will be reduced, thevoltage will fall below that of solenoid 10, valve 8 will be released shutting off the compressed air and opening the release passage 1 a further reduction of speed releases armature 12, completing the clrcuit to solenoids 1 1 and 18 and again raising valve member 8 and applying the brakes; upon the second application of brakes the speed of the train being less than at the first application, it is desirable that the air pressure be approximately.

reduced in proportion to the reduced train speed; this result is obtained by means of valve 15 which is opened, when solenoid 18 becomes energized, to a sufiicient extent to reduce the air pressure in its passage to the brake cylinder. The speed of the train hava ing been still further reduced upon the second application of brakes and the voltage falling be ow that of solenoids 11 and 18the brakes are again released; the final ap lication of brakes is effected by throwing t e valve G into the emergency osition o enin assa e 3 and the vehicle is brought lb a sIO p. B y means of any well known form of device the air release is adapted to be closed when the valve 0 is thrown into emergency position. As desired, the number of successive applications may be increased by the addition of other operatin solenoids such as 10 and 11, circuit solenoi' s such as E, and pressure-reducing solenoids such as 18.

It will be readily seen that the construction and arrangement of parts embodying my method may be in any suitable form as desired, that shown being one desirable by reason of simplicity of design and operation. The method may be adapted for use not only on single cars, but also on trains with multiple control, in which latter case every motor car may be equipped with brake-setting mechanlsm; however, in operation it is desired that the mechanism on the front car only be used.

, sai

Having thusdescribed my invention, what I claim as new and desire to-secure by Letters Patent is:

1. In a braking paratus in combination, a motor and a plura ity of solenoids of differing voltages in circuit with said motor.

2. Ina brakin apparatus in combination, a motor, a plura ity of solenoids of difiering voltages in circuit with said motor and a valve member ada ted to be operated by each of said solenoi s when energized.

' 3. In a brakin apparatusin combination, a motor, a plurality of solenoids, of differing voltages, a switch member adapted to complete the circuit between said motor and said solenoids, and a valve member adapted to be operated by each of said solenoids.

4. In a braking apparatus in combination, a motor, a plurality of solenoids, a switch member adapted to complete the circuit between the motor and one solenoid of said series, and a solenoid adapted to operate to complete the circuit between the motor and the other solenoid of said series.

5. In a brakin apparatus in combination, 'a motor, a plura 'ty of solenoids of differing voltages, means for completing the circuit between the motor and said series of solenoids, a solenoid not in said series, and a valve member adapted to be operated by said separate solenoid. v

6. In a braking ap aratus in combination, a motor, a series of so enoids, means for completing the circuit between the motor and said series of solenoids, a valve member ada ted to be operated by each solenoid of series, a solenoid not in said series, means for completing the circuit between the motor and said separate solenoid and a second valve member adapted to be operated by said separate solenoid.

7. In a braking apparatus in combination, a vehicle, a motor on said vehicle, a series of solenoids of differing volta es, a valve member adapted to be operate by each solenoid of said series, and means for successively completing the circuit between the motor and successive solenoids of said series at differing rates of speed of said vehicle.

8. In a braking apparatus in combination, a motor, a series of solenoids of difiering voltages, means for com leting the circuit between said motor an each solenoid of said series, an air passage, an air release passage, and a valve member adapted to be operated by one solenoid of said series to open one of said passages and to close the other of said passa es.

9. n a braking a paratus in combination, a motor, a series 0' electro-magnets, means for com leting the circuit between the motor and eac electro-magnet of the series, an air passage, an air release passage and a valve member adapted to be operated by each electro-Inagnet of the series successively to open one of said passages and to close the other of said passages.

10. In a braking apparatus in combination, a series of electro-magnets, an air passage, an air release assage, and means adapted to be operated by each of the electro-magnets successively to open one of said passages and to close the other of said passages at differing rates of speed of a vehicle.

11. In a brakin apparatus in combination a motor an a lurality of electroma nets of differing voliiages in circuit with sai motor.

12. The combination with a braking apparatus of a series of electro-magnets adapted to operate to successively set and release the brakes of a vehicle.

13. The combination with a brakingapparatus of a motor, a series of electro-magnets, and means for completing the circuit between the motor and successive electro-magnets of the series at differing rates of speed of a vehicle.

14. The combination with a braking apparatus of a motor, a series of electro-magnets, and means for successively completing the circuit between the motor and successive electro-magnets of the series.

15. The combination with a braking apparatus of a series of electro-magnets adapted to operate to successively set the brakes of a vehicle at differing rates of speed of the said vehicle.

In testimony whereof I have hereunto signed my name to this specification in the presence of two subscribing witnesses.

SIEGFRIED G. FREUND. Witnesses:

FREDERICK R. SLATER, ALBERT RUCKGABER. 

